The rocket on the pad is a Saturn IB but when it is launched it changes to a Saturn V.
When Steve jumps the fence at the beginning of Victoria's footage of him, there is an obvious splice at the point where he is clearing the top of the fence: the angle changes slightly, and in the background, the grey barrel and the red barrel just next to it change positions.
When Steve lifts the reporter up from the cliff with his Bionic arm, to make it look easy, they had a guy pushing her up to him, and his hand is seen for a split second holding her ankle.
Shadow of drifting smoke-wisps (probably exhaust from a power generator or a camera-crew vehicle) clearly visible on the sand in the shot of the two vertically-stuck arrows.